<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <div id="app">
    <div>{{ message }}</div>
    <div><input type="text" v-model="message"></div>
    <div><input type="text" :value="message" @input="message = $event.target.value"></div>
  </div>

  <script src="./lib/vue.global.js"></script>
  <script>
    Vue.createApp({
      data() {
        return {
          message: 'Hello'
        }
      },
    }).mount('#app')
  </script>
</body>
</html>